Question

$K_3\left[Al{\left(C_2{O}_4\right)}_3\right]$ is called:

• A. Potassium alumino oxalate
• B. Potassium trioxalatoaluminate(III)
• C. Potassium aluminium(III) oxalate
• D. Potassium trioxalato aluminate(VI)

Answer 1

Answer: (B)

Potassium trioxalatoaluminate(III)

The name of the counter ion is potassium. The complex ion has aluminum (III), so it will be called aluminate(III). Note that we can determine the oxidation number of aluminum by the charge balance. Also, it contains 3$[C_2{O}_4{]}^{2-}$ groups, so it will be called trioxalato.

Combining all, we get that the name of the negative ion is trioxalatoaluminate(III). So, the name of the compound becomes potassium trioxalatoaluminate(III).